Mutag BioChipTM, carrier media for the growth of organisms in biological moving bed systems with an active surface of >3,000 m /m . Degradation rates of 4-5 kg NH4-N per m and 120-160 kg COD per m and day. Consequently, the micro-organisms can be optimally supplied with nutrients and the metabolic products are efficiently transported away, which at least partially explains the effectiveness and high degradation efficiency of the Mutag BioChip . The Mutag BioChip is shaped like a parabolic disc for optimal moving. The best available carrier serves best result and saves investment and operation costs.